(19)

(11)

EP 3 155 764 A1

(12)

(43) Date of publication: 19.04.2017 Bulletin 2017/16 (21) Application number: 15731719.9 (22) Date of filing: 11.06.2015

(51) International Patent Classification (IPC):  H04L 12/46(2006.01) (86) International application number: PCT/IB2015/054415 (87) International publication number: WO 2015/189795 (17.12.2015 Gazette 2015/50)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 13.06.2014 IN 2899CH2014 (71) Applicant: ABB Schweiz AG 5400 Baden (CH)	(72) Inventor: THAZHATHETHIL, Shabeer Palakkad 679503 (IN) (74) Representative: Zimmermann & Partner Patentanwälte mbB  Josephspitalstr. 15 80331 München 80331 München (DE)